Full name: light month
Plural form: light months
Alternate spelling: lightmonth
Category type: length
Scale factor: 777062051136000
The SI base unit for length is the metre.
1 metre is equal to 1.28689851542E-15 light month.
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A light-month (also written light month) is a unit of length. It is defined as the distance light travels in an absolute vacuum in one full month (thirty days of 86,400 seconds each) or 777,062,051,136,000 metres (~777 Tm).